Characteristics of Electro-hydraulic Servovalve with an Asymmetric Nozzle Flapper

China Mechanical Engineering ›› 2011, Vol. 22 ›› Issue (8): 957-960,970.

Previous Articles Next Articles

Characteristics of Electro-hydraulic Servovalve with an Asymmetric Nozzle Flapper

Yin Yaobao;Meng Wei

Tongji University,Shanghai,200092

Online:2011-04-25 Published:2011-05-04
Supported by:

National Natural Science Foundation of China（No. 50775161）;

Aviation Science Foundation of China（No. 20090738003）;
National High-tech R&D Program of China (863 Program) （No. 2007AA05Z119）

非对称喷嘴挡板式电液伺服阀特性分析

訚耀保;孟伟

同济大学,上海,200092

基金资助:
国家自然科学基金资助项目(50775161)；航空科学基金资助项目(20090738003)；国家高技术研究发展计划(863计划)资助项目(2007AA05Z119)
National Natural Science Foundation of China（No. 50775161）;

Aviation Science Foundation of China（No. 20090738003）;
National High-tech R&D Program of China (863 Program) （No. 2007AA05Z119）

Abstract

Abstract:

The structure and characteristics of an electro hydraulic servovalve with an asymmetric nozzle flapper which has a pair of hydraulic resistances in

the nozzle chambers were analyzed. The load pressure characteristics, nozzle chamber

pressure characteristics and the pressure characteristics at zero point were obtained. The design method of force and rigidity of the torque motor were discussed. The theoretical results are in good agreement with the experimental ones.The load pressure of electro hydraulic servovalve with an asymmetric nozzle flapper at zero point is bigger than 50% of supply pressure, but the nozzle chamber pressure is less than 50% of supply pressure. The load pressure characteristics are asymmetric, and the cross point of the two load pressure curves deviates the neutral point.The coefficient of hydraulic resistance is suggested to be

1.5 to 2.5 in order to get good linearity of load pressure.

Key words: asymmetric nozzle flapper, electro hydraulic servovalve, resistance, chamber, pressure characteristics

摘要：

分析了一种新型非对称喷嘴挡板式电液伺服阀的结构和特性。该阀在两喷嘴容腔处设置一对阻尼节流器，得到了喷嘴容腔和负载压力特性、零位压力特性,以及力矩马达驱动力和刚度设计方法。理论和试验结果表明：内置阻尼节流器的电液伺服阀喷嘴容腔的零位压力小于供油压力的50%，负载容腔的零位压力大于供油压力的50%;液阻系数不对称时，负载压力曲线不对称，其交点偏离中位;为提高零位时负载压力的线性度，液阻系数的取值宜在1.5至2.5之间。

关键词:

非对称喷嘴挡板, 电液伺服阀, 节流器, 容腔, 压力特性

CLC Number:

TH137.5

YIN Yao-Bao, MENG Wei.

Characteristics of Electro-hydraulic Servovalve with an Asymmetric Nozzle Flapper

[J]. China Mechanical Engineering, 2011, 22(8): 957-960,970.

訚耀保, 孟伟.

非对称喷嘴挡板式电液伺服阀特性分析

[J]. 中国机械工程, 2011, 22(8): 957-960,970.

[1]	Fujian SUN, Qianfang ZHU, Zhiqiang LIANG, Yanjun LU, Jinlong CHEN, Yubin XIAO, Hao HUANG, Jianping YUAN. Research on Tribological Properties of Hardened Bearing Steel Surfaces by Electric Pulse Assisted Hard Turning [J]. China Mechanical Engineering, 2025, 36(11): 2537-2543.
[2]	LIAO Qiansheng1, 3, LIU Hesheng2, KUANG Tangqing2, LIU Jiahao2, ZHANG Wei2. Effects of Glass Fiber Mass Fraction on W-PACIM Pipes of Long Glass Fiber Reinforced Polypropylene [J]. China Mechanical Engineering, 2025, 36(06): 1329-1337.
[3]	JIAO Jiqiang1, 2, MENG Jun2, XIE Wenjun2, Guo Fangzhun1. Structure Design and Performance Study of Titanium Alloy-lined Thin-wall Chambers [J]. China Mechanical Engineering, 2025, 36(02): 265-270.
[4]	PENG Yuxin1, 2, 3, LIU Sheng1, 2, 3, HU Xinbin1, 2, 3. Effects of Ni Interlayers on Mechanical Properties and Microstructure of Resistance Spot Welding Joints of 6061T6 Aluminum Alloy Plates/08Al Dissimilar Metal [J]. China Mechanical Engineering, 2024, 35(07): 1290-1298.
[5]	HUANG Yun, HUANG Jianchao, XIAO Guijian, LIU Shuai, LIN Ouchuan, LIU Zhenyang. Research Progresses of Superhydrophobic Surface Processing Technology and Abrasion Resistance [J]. China Mechanical Engineering, 2024, 35(01): 2-26.
[6]	LI Kunhang, ZHANG Siqi, WU Wei, HU Mingzhuo, SUN Yaling, XIONG Xin, HUANG Hong. Multi-field Coupling Simulation and Analysis for Resistance Spot Welding of Three-layer Dissimilar Unequal-thickness Steels [J]. China Mechanical Engineering, 2023, 34(24): 2996-3003.
[7]	XU Xiang, ZHANG Yilun, MEI Zheng, LI Jian, WANG Dan, MU Liansong. Numerical Simulation and Experimental Investigation of Flow Fields in Vehicle Climatic Chambers [J]. China Mechanical Engineering, 2023, 34(17): 2115-2123.
[8]	YANG Yuzhao, YANG Chen, XU Cheng, FAN Lixia. Forming Mechanism of Axial Wrinkle Defects in Inner Walls of Radial Precision Forged Gun Barrel with Integrated Forming Chamber and Rifling [J]. China Mechanical Engineering, 2023, 34(16): 1991-2000,2008.
[9]	TAO Shuangquan, HAO Xiaozhong, YANG Zijian, LIU Shuting. Hybrid of Self-resistance Electric Heating and In-situ Membrane Heating of CF/PEEK Composites Consolidation [J]. China Mechanical Engineering, 2022, 33(22): 2748-2754.
[10]	SHI Haotian, ZHANG Hongpeng, XIE Yucai, SUN Yuqing. A Resistance-Inductance Debris Sensor Based on Microfluidic Fabrication [J]. China Mechanical Engineering, 2022, 33(20): 2468-2475.
[11]	FAN Xin, REN Siming, WANG Haixin , PU Jibin. Environmental Adaptability and Tribological Properties of MoS2/WS2 Composite Films [J]. China Mechanical Engineering, 2022, 33(12): 1468-1476.
[12]	WANG Zhifang, YANG Zixuan, CHEN Qingren. Digital Verification Method of Ship EEDI [J]. China Mechanical Engineering, 2022, 33(10): 1189-1194.
[13]	LI Huan, LYU Tianle, XIA Yujun, LI Yongbing. Adaptive Control Research and Quantitative Evaluation of Resistance Spot Welding Expulsion Based on Electrode Displacement [J]. China Mechanical Engineering, 2022, 33(09): 1025-1033.
[14]	HAN Bingyuan, , CHU Jiajie, ZHOU Kebing, ZHU Sheng. Research on Present Situation of Quality Control and Performance Optimization of Thermal Spraying Coating Based on Remelting Technology [J]. China Mechanical Engineering, 2022, 33(06): 727-739.
[15]	LEI Chaofan, CHU Xiumin, LIU Chenguang, WU Wenxiang, LI Songlong, . Predictive Controller of Cooperative Docking for Ship Platoon in Lock Waterway [J]. China Mechanical Engineering, 2022, 33(04): 421-431.

Characteristics of Electro-hydraulic Servovalve with an Asymmetric Nozzle Flapper

非对称喷嘴挡板式电液伺服阀特性分析

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics